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The earliest known records of wartime activities detail the history of

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Intern
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Joined: 11 Jul 2018
Posts: 20
Re: The earliest known records of wartime activities detail the history of  [#permalink]

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New post 11 Jul 2018, 16:14
A. The use of carrier pigeons is usually preferable to the use of portable electronic devices when a military unit needs a way to send classified military information.
Not Valid answer due to word "Usually" plus some common sense experience of drones now a days.

B. The messages that carrier pigeons carry cannot be intercepted.
"Cannot" invalidates it. There are numerous instances in past when even birds were intercepted. Not a valid answer either.

C. The use of carrier pigeons decreased once portable electronic devices became practical in warfare.
"Even today" indicates that pigeons are perhaps still used. However, "portable electronic devices" are also in use. Which indirectly indicates that this can be a right answer.

D. Carrier pigeons were used in warfare prior to the date of the earliest known record of wartime activity.
This cannot be inferred from lines provide. It may be true but not possible to be deducted from reasoning given as proof. Not a valid answer either,

E. Carrier pigeons are still used extensively by modern military units.
"Extensively" plus some common sense experience of drones now a days.
Manager
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Joined: 07 Feb 2017
Posts: 189
Re: The earliest known records of wartime activities detail the history of  [#permalink]

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New post 12 Jul 2018, 18:34
"The earliest known records of wartime activities detail the history of the use of carrier pigeons"

D. Carrier pigeons were used in warfare prior to the date of the earliest known record of wartime activity.
It matches the first sentence lol
GMAT Club Bot
Re: The earliest known records of wartime activities detail the history of &nbs [#permalink] 12 Jul 2018, 18:34

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The earliest known records of wartime activities detail the history of

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